A filmmaker, generally a director, who creates a body of work with a unified sensibility that reveals, through the interplay of themes and styles, a personal worldview. The term originated with François Truffaut, whose 1954 essay "Une certaine tendence du cinéma français" put forth the idea that the most interesting films were those that functioned as a medium of personal expression--and therefore bore the distinctive imprint of their "author." American critic Andrew Sarris later translated and expanded this idea into an "auteur theory," which proposed an evaluation of films based on their context within the filmmaker's oeuvre, rather than for their technical proficiency or greater historical significance. The term "auteur" later came to refer to any filmmaker who performed or was intimately involved in all aspects of the moviemaking process (writing, directing, producing, editing, etc.).